I'm making a sig 938 holster for the wife of a customer going to Vegas for a four day course. I will not make a holster for a 1911 that has the safety in the off position, The firearm was created to be chambered, cocked, and safety on. That's how the holster will be made.
Personally if i wasn't going to carry in condition 1, I wouldn't buy a 1911 - that's what they're designed for. If I were going to carry hammer down, I'd buy a DA pistol, and I wouldn't use both the safety and hammer down. I'd pick one.